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Finding the Fourth Proportional to 2,438.48, 3,657.72 and 878.69

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Solution

The fourth proportional to 2,438.48, 3,657.72 and 878.69 is: 1,318.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,438.48 : 3,657.72 = 878.69 : x
  2. Step 2: Convert to fraction form
    2,438.48/3,657.72 = 878.69/x
  3. Step 3: Cross multiply
    2,438.48x = 3,657.72 × 878.69
  4. Step 4: Simplify right side
    2,438.48x = 3,214,001.99
  5. Step 5: Solve for x
    x = 3,214,001.99/2,438.48
  6. Step 6: Final answer
    x = 1,318.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.